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CHAPTER 
9
The Modulation Matrix and Definable Knob
CREATING MODULA-
TION CONFIGURA-
TIONS VIA ASSIGN
As a rule, it is of course desirable to 
be able to create modulation rout-
ing configurations on a synthe-
sizer. In other words, you want to 
enjoy the freedom to combine dif-
ferent modulation sources and 
destinations as you see fit. Some-
times you may come up with ideas 
for standard modulations that the 
”hard-wired” factory modulation 
routing options simply can’t sat-
isfy. This is why we opted to equip 
the Virus with a versatile Modula-
tion Matrix – you’re sure to find it a 
welcome addition. On the Virus, 
you can create modulation routing 
configurations freely as you see fit 
using ASSIGN options. They are 
located in the EDIT menu, where 
they appear under the name of – 
you guessed it – ASSIGN).
The three ASSIGN options let you 
control up to six modulation desti-
nations via up to three modulation 
sources. Simply go to ASSIGN, 
select one of the modulation 
sources (SOURCE) and one or sev-
eral modulation destinations (DES-
TINATION). Each of these 
configurations features a parame-
ter that determines modulation 
intensity (AMOUNT). ASSIGN 1 can 
control one modulation destina-
tion, ASSIGN 2 can control two and 
ASSIGN 3 can control three modu-
lation destinations, each with 
independent AMOUNTs.
These ASSIGN options serve sev-
eral purposes: for one, they let you 
assign an external MIDI controller, 
for example, the keyboard’s modu-
lation wheel, to the desired param-
eter. You can also chose to use the 
sound generator’s internal modu-
lators, such as LFOs and envelopes, 
as modulation sources. The control 
range of the source may be limited 
via the AMOUNT values or inverted 
so that the modulation occurs 
strictly within the desired value 
range for the target parameter. For 
your target parameters, you can 
chose from among virtually all 
sound parameters that feature an 
infinitely variable control range – 
ergo, you have more than 100 
modulation destinations at your 
disposal!  Since the sources and 
destinations may be selected inde-
pendently, you may even modulate